How to connect Postal Data API to Claude Cowork

Cowork is Anthropic's AI agent for knowledge work. Think of it as Claude Code for everything else. It works autonomously with your computer, local files, and applications to accomplish complex tasks.

This guide walks you through the easiest and most secure way to connect your Postal Data API account to Cowork via Composio Connect, enabling it to validate ZIP code for customer address, find coordinates for postal code, lookup region metadata by postcode, and more such actions on your behalf without compromising your account security.

Connecting Postal Data API to Claude Cowork

1. Open Customize

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

2. Add the Composio MCP server

Click Add custom connector and paste in the Composio MCP server URL:

Claude Cowork is Anthropic's agent for general knowledge work. It can use your computer, files, and connected applications to complete longer-running tasks across your work tools.

With Composio Connect, Cowork can securely access apps like Postal Data API through MCP without you sharing account credentials directly with the agent.

The Postal Data API MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Postal Data API account. It provides structured and secure access to global postal code and location data, so your agent can validate postal codes, look up locations and coordinates, search postal codes by city, retrieve regional metadata, and check service information on your behalf.

• Postal code validation: Have your agent check whether a postal code exists without treating an invalid code as an execution error.
• Bulk postal code checks: Instruct your agent to validate up to 1,000 postal codes at once, including codes from different countries.
• Location and coordinate lookup: Let the agent find the city, region, and coordinates associated with a postal code.
• City-based postal code search: Direct your agent to find postal codes for a city and optional region, including close matches.
• Regional details and service status: Have your agent retrieve available timezone, county, elevation, and administrative details for a postal code, or check coverage, guidance, balance, and rate-limit status.